Fluoride helps teeth resist decay. Normally your toothpaste will contain fluoride which is enough for most people. Sometimes more fluoride can be helpful in the fight against decay, especially if you have medical problems, or poor oral hygiene.

If your dentist thinks added fluoride could be useful, they may recommend one of the following:

• wearing trays of fluoride gel overnight,
• using a mouth wash with a high concentration of fluoride,
• using a high concentration fluoride toothpaste (only available on prescription).